Trolley-harp fastener.



A. C. MINER.

TROLLEY HARP FASTENER APPLICATION FILED AUG.4, 1915.

1,164,955. Patented Dec. 21, 1915.

Witnesses 7?, Attorneys iinrrnn sra ras rarest orrion ALFRED C. MINER, OF MISSOULA, MONTANA.

TBOLLEY-I-EABP FASTENER.

To all whom it may concern:

Be it known that I, "iL-rnnoC. MINER, a

citizen of the United States, residing at Missoula, lri'tlle county of Missoula and State of Montana, have invented anew anduseiul Trolley-Harp Fastener, of which the following is a specification.

The device forming the subject matter'of this application is a trolley pole, and the invention aims to provide a pole so construct ed that the constituent parts of the pole may have relative movement in a vertical plane parallel to the direction of advance of the pole, and have, also," a lateral move-- ment in a plane'at right angles to the direction in which the pole is advancing, the ends in view being, in the'one instance, to maintain the trolley wheel engaged with the conducting wire and, upon the other hand,

to permit a lateral movement of the/ upper portion of the trolley pole when the car provide, in a device of the class described,

a spring or sleeve which at once permits the necessary movement between the sections of the trolley pole, serves to hold the upper section of the trolley pole sustained, so that the trolley wheel will engage with the conductor, and shields the link which forms an operative connection between the trolley pole sections. H I

It is within the provinceof the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the w details of construction hereinafter described Specification of Letters Patent.

Patented Dec. 21, 1915.

Application filed August a, 1915. Serial No. 43,626.

In the accompanying drawings :Figure 1 shows the invention in side elevation; Figs. 2 and 3 are elevations, wherein the trolley pole is viewed at right angles in the respective views, the sleeve being broken away and parts appearing in section.

In carrying out the present invention there is provided a pole comprising a lower section 1 enlarged as shown at 2 to define a shoulder 3 receiving an abutment 4, preferably in the form of a ring, the abutment 4 being held in place by a rivet 5 or other'securing device. The upper section of the trolley pole is denoted by the numeral 6 and carries a harp 7 in which is journaled a trolley wheel 8. Adjacent its lower end, the upper section 6 is enlarged as shown at 9 to form a shoulder 10 receiving an abutment ring 11 held in place by a rivet 12 or otherwise.

The enlarged end 2 of the lower section 1 is provided with ears 14, and on the enlarged end 9 of the upper section 6 there are ears 15, the ears 14 and 15 standing at right an gles to each other. i

The invention contemplates the use of an intermediate link 16 having a reduced,

of the pole sections and embracing the same I closely is a resilient sleeve in the form of a tightly wound helical spring 21, one end of which engages with the abutment 4, the other end of which coacts with the abutment 11.

The construction is such that the upper section 6 of the pole may swing vertically in a plane parallel to the line of advance of the pole, and may swing laterally in a direction at right angles to the line of advance of the pole, without having a universal or wabbling movement, such a movement tending to cause the trolley wheel 8 to jump from the overhead conductor 25 wherewith the wheel coacts. The spring 21 serves to uphold the upper section 6 of the trolley pole with sufficient force so that a contact adequate to prevent arcing at the point of contact between the wheel 8 and the overhead I conductor will be secured. The link 16 together' with its pivot elements forms an eificientconductor, in connection. with the sections land 6'. The spring '21not only v exercises its obvious function as a' means for holding the sections 1 and 6 1n approxl mate axialahnenient, but, as well,.consti tutes a housing within the contour. of which is located the link 16 a-ndits pivot elements '19- and 20. The ends of the spring 21 engage the abutments 4: and 11 when the pole. I is flexed, and thus a proper contact is at all times secured at the points where the pivot elements 19 and 20 pass through the link 16.

pole joint constitutin this application.

Having thus described the invention, what is claimed is 1. In a device of the interposed between the, sections and, pivoted thereto, the link and the sections being pro- Copies of this patent may be obtained fonfive cents each, addressing" the Commissioner of Patents,-

a 7 class described, aipole' comprising upper and lower sections; a link videdwith interengaging elements whereby fthe upper'section will be held to, the lower ,se ction for, movement in two relativelyfixed I rectangularly disposed planes; and a resilient sleevesurrounding the. ends .()f the-sec tions and housing the link. I v

,2. In a device of theclass described, a pole comprising"upper-andlower sections; a'link j interposed between the sections, and pivoted thereto, the'link a nd the'sections being-pro- Y vided withinterengaging elements whereby the uppensectionwill be held to the "lower 'sectionfor movement in two relatively fixed rectangularly disposed planes; an abutment on thej upper section; an abutmentonthe.

lower section; and'a helical spring'inter fposed between the abutment's, the-helical spring receiving the' adj'acent ends of the sections and constituting a housing for the I link.

-' In testimony that "I claim the ir'oreg ohig as my own, I have hereto affixed my signature in the presence of two witnesses. I

a ALFRED O. MINER. Witnesses: 1 1 f GEO. C; TOLER,

WALTER M. BIcKFo 'WashingtoI D. 0.? V 

